diff --git a/1.3/Assemblies/RJW_Menstruation.dll b/1.3/Assemblies/RJW_Menstruation.dll
index d9b682c..eaa76fc 100644
Binary files a/1.3/Assemblies/RJW_Menstruation.dll and b/1.3/Assemblies/RJW_Menstruation.dll differ
diff --git a/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs b/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
index fd0b606..07b30a8 100644
--- a/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
+++ b/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
@@ -1745,13 +1745,13 @@ namespace RJW_Menstruation
             {
                 case Stage.Follicular:
                 case Stage.ClimactericFollicular:
-                    return (int)(Props.follicularIntervalDays * 24 * (cycleSpeed * 1.5f) * (1 + Rand.Range(-cycleVariability, cycleVariability) * 1.5f * variabilityFactor));
+                    return (int)(Props.follicularIntervalDays * 24 * (1 + Rand.Range(-cycleVariability, cycleVariability) * 1.5f * variabilityFactor) / (1 + (cycleSpeed - 1) * 1.5f));
                 case Stage.Luteal:
                 case Stage.ClimactericLuteal:
-                    return (int)(Props.lutealIntervalDays * 24 * (cycleSpeed * 0.5f) * (1 + Rand.Range(-cycleVariability, cycleVariability) * 0.5f * variabilityFactor));
+                    return (int)(Props.lutealIntervalDays * 24 * (1 + Rand.Range(-cycleVariability, cycleVariability) * 0.5f * variabilityFactor) / (1 + (cycleSpeed - 1) * 0.5f));
                 case Stage.Bleeding:
                 case Stage.ClimactericBleeding:
-                    return (int)(Props.bleedingIntervalDays * 24 * (cycleSpeed * 0.5f) * (1 + Rand.Range(-cycleVariability, cycleVariability) * 0.5f * variabilityFactor));
+                    return (int)(Props.bleedingIntervalDays * 24 * (1 + Rand.Range(-cycleVariability, cycleVariability) * 0.5f * variabilityFactor) / (1 + (cycleSpeed - 1) * 0.5f));
                 case Stage.Recover:
                     return (int)(Props.recoveryIntervalDays * 24 * Rand.Range(-0.05f, 0.05f));
                 default:    // Often unused